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sech(sinh(x)*tan(x))=1-12/4!*x^4-360/6!*x^6-4592/8!*x^8...
0

%I #4 Feb 24 2012 12:50:53

%S 1,0,-12,-360,-4592,866880,144205248,10276506240,-1972062209792,

%T -1066588240250880,-219129099375885312,33054966279836497920,

%U 54554661987210721497088,24677742880461438548951040

%N sech(sinh(x)*tan(x))=1-12/4!*x^4-360/6!*x^6-4592/8!*x^8...

%K sign

%O 0,3

%A Patrick Demichel (patrick.demichel(AT)hp.com)